Cut-off valve



(No Modal.) 2 sheets-sheet 1. D. B. KENNEY. GUT-OPP VALVE.

Patented Ja.11.`12, 1892.

W/TNESSES: Wa/QVJ. vam') ma Nanms sans ca, Pun-nomma, wmumfun, nA c.

(No Model.)

Y2 Sheets-Svhelef 2v. D. B. KENNEY. GUT-OPF VALVE.

Patented Jan. 12, 1892 WWM my M M M2M W 1 mm .m.

NrED STATES PATENT OFFICE.

DANIEL I3. KENNEY, OF DETROIT, MICHIGAN.

CUT-OFF VALVE.

SPECIFICATION forming part of Letters Patent No. 467,033, dated January 12, 1892. Application filed March 2, 1891. Serial No. 383,424. (No model.)

T0 @ZZ whom t may concern.-

Be it known that I, DANIEL B. KENNEY, of Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Out-Off Valve, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved cut-oli:l valve which is simple and durable in construction, very effective and automatic in operation, and more especially designed for use on natural-gas mains and pipes to automatically shut oft` the gassupply after the pressure has once gone down.

The invention consists of certain parts and details and combinations of the saine, as will be hereinafter fully described, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a transverse section of the improvement with the valve seated and the gas-supply shut od. Fig. 2 is a sectional plan View of the same with thev valve removed from the valve-body, the section being taken on the line m in Fig. l. Fig. 3 is an enlarged sectional side elevation of the valvebody with the valve shown in elevation and in an uppermost position. Fig. is a sectional side elevation of the improvement at right angles to the section in Fig. l with the valve supported from the diaphragm. Fig. 5 is an inverted sectional plan view of the same on the line y y of Fig. 4. Fig. 6 is a face view ot' the valve, and Fig. 7 is an end elevation of the same.

The improved cut off valve is provided with a suitably-shaped valve -body A, provided on opposite sides with openings B and C, of which one connects with the gas-main and the other connects with the service-pipe for leading gas to the dwelling. The inner ends of the openings B andC lead to a chamber D, in which are formed valve-seats E and E', respectively located on the inner ends o f the openings B and C. On the valve-seats E and E is adapted to be seated a valve F, preferably of a construction similar to the one shown and described in Patent No. 411,283, grantedtoJamesGalvin on September17,1889. The valve F is provided with a yoke F., on

the sides of which are pivoted the valve-disks F2 and F3, adapted to be seated on the valveseats E and E', respectively. The pivoting of the valve-disks is effected by means of the lugsff on lower side of the yoke at its ends entering apertures f f in the upper ends of the Valve-disks, as best shown in Figs. 6 and 7. The disks F2 and F3 are forced to their seats by the wedge-shaped lugs F4 and F5, hung on lugs f3, depending from the yoke F between the said disks F2 and F3. The yoke Fis provided with a top plate FG,in which is formed a central opening into which is adapted to pass the inverted conically-shaped head G', secured at its base to a shank G2, projecting from the lower end of a stem G, extending upwardly and secu red to a diaphragm I-I, held in a diaphragm-casing I, secured to the upper end of the valve-body A. The under side of the diaphragm-chamber I isl at all times in communication with the chamber D, so that when the valve F is in an uppermost position gas from the gas-inain can pass into the chamber D through the valve F into the lower part of the casingI to press against the under side of the diaphragm H.

On the sides of the yoke F are arranged sets of lugs F7 and F8, adapted to engageprojections D? and D4, respectively, formed on the inner sides of the valve-chamber D, as is plainly illust-rated in Fig. 3. The lugs Ff are arranged on one side of the yoke F above the lugs F8, which are on the opposite side, so that the said lugs F7 come in contact with their projection Dbefore the lugs Fscome in contact with their projection D4 at the time the said valve F is lifted upward. On the downward movement of the valve the lugs F8 pass olf the lugs D4 previous to the lugs F7 striking against the projections D3. On the upward movement of the valve F the lugs F7, on moving over the projections D3, hold the yoke F in such a position that the head G can pass into the opening of the plate F6. As soon as the lugs F7 have passed the projection D3, the lugs F8 come in contact with their projections D4, so that the yoke F is shifted to one side, and the head G moves under the plate F, so that the shank G2 rests against the inner wall of the opening in the said plate, as is plainly illustrated in Fig. 4. The valve F is thus supported on the valve-stem G,

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hung on the diaphragm II. The latter is then 1n an uppermost position, pressed upward by the force of the gas passing from the gas-main into the casing I, as previously described. As soon as the pressurev in the gas main .ceases the diaphragm II moves downward 1nto a lowermost position, assisted by the weight of the valve, so that the valve F is moved downward by the stem G, the lugs Fs move oi the project-ions D4, and the lugs FT come in contact with their projections D3, so that the yoke F is again shifted into a central position, and the head G is disengaged from the plate F6, so that the valve F drops downward by its own weight and seats itself on the valve-seats E and E', thereby shutting off the gas-supply from the service-pipe. It 1s understood that when the valve F drops the disks F2 and F3 are forced firmly against the valve-seats E and E', respectively, by the action of the wedge-shaped lugs F* and F5 coming in contact with the projections D and D2 on the inside of the valve-chamber D. (See Fig. l.)

In order to again raise the valve F, so as to support it from the diaphragm H and to establish connection between the gas-main and the service-pipe, and also with the casing I, the following device is provided: In the lower part of the valve-body A is fitted to slide vertically a pin J, carrying on its upper end a set-screw J', adapted to engage lugs F9, projecting inwardly from the disks F2 and F3 of the valve F. The pin J passes through a suitable stuting-box in the valve-body to prevent leakage. 'lhe outer end of the pin J is pivotally connected with a lever K, pivoted on a link L, pivoted to the valve-bod y A. The normal position of the lever K and the pin J is shown in Fig. l,and when it is desired to raise the valve F off the seatsE and E and to engage it with the valve-stem G then the operator moves the lever K upward in the direction of the arrow ct', so that the set-screw J engages the lugs F, thereby pressing the valve F upward oit the seats E and E. The valve F in sliding upward in the chamber D engages by its lugs Fthe projections D3 to hold the valve F in a central position to permit the head G to pass into the opening in the plate FG, as previously described, when the lugs FS, on the further upward movement of the lever K, come in contact with the projections D4 to engage the plate FG with the head G. As

soon as the valve F is thus suspended from the diaphragm II the operator moves the lever K downward into the position shown in Fig. l. NVhen the pressure in the main ceases, as previously described, the diaphragm II moves downward, as shown in dotted lines in Fig. l, and the valve F is dropped from the stem G and seated on the seats E and E', thus shutting 0E the flow of gas from the main to the service-pipe.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent l. The combination, with the casing havinginlet and outlet ports, a downwardly-closing laterally-movable valve therefor, and cam projections for shifting the valve laterally to set and release it when it is moved up and down, respectively, of a diaphragm provided with a stem having a head on its lower end separably engaged by the upper end of the valve when the valve is raised, whereby when the diaphragm moves the stem downward the valve will be disconnected from the said head by said cam projections and fall, and means for raising the valve, substantially as set forth.

2. The combination, with the casing having inlet and outlet ports and an intermediate chamber provided with opposite projections in its upper end, a downwardly-closing valve provided at opposite sides of its upper end with oppositely-inclined cams or lugs to engage said projections and shift the valve laterally in opposite directions to set or release it, and an undercut opening or recess in the upper end of the valve, of a diaphragm having a stem entering the upper end of the said chamber and provided with a head to be engaged with or disengaged from the wall of said opening or recess, as the case maybe, and means for raising the valve to engage it with said stem, substantially as set forth.

3. A cut-olf valve consisting in the easing A, having transversely aligned ports and valve -seats E E', a vertical intermediate chamber D, provided on its upper end with opposite projections D3 D4 and in its lower end on its sides, at right angles to the valveseats, with opposite inclines D D2, the vertically-movable valve F, consisting in the yoke F', having an undercut aperture in its top plate F, oppositely-inclined cams or lugs F7 Ff3 on its opposite sides to shift the valve laterally to set or release it, valve-disks F2 F, suspended from opposite sides of the yoke, wedge-shaped lugs F4 F5, suspended from the ends of the yoke between the valve-disks and operated by the inclines D2 D to'press the valve-disks outward against seats E E', and the rod J, extending through a packing-gland into the bottom of chamber D to raise the valve, substantially as set forth.

DANIEL B. KENNEY. liitnesses:

THoMAs K. DoHEn'rv, THOMAS T. RING.

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